Finding the Fourth Proportional to 8,047.20, 10,902.60 and 8,047.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,047.20 : 10,902.60 = 8,047.20 : x
2. Step 2: Convert to fraction form
   8,047.20/10,902.60 = 8,047.20/x
3. Step 3: Cross multiply
   8,047.20x = 10,902.60 × 8,047.20
4. Step 4: Simplify right side
   8,047.20x = 87,735,402.72
5. Step 5: Solve for x
   x = 87,735,402.72/8,047.20
6. Step 6: Final answer
   x = 10,902.60